Electric lamp stand



June 11, 1940. MATTHIES zmzcmuc LAMP STAND Filed Oct. 23, 1937 292 1Sizz'azzzzj:

u L E a l atented june 11, 1940 arises PATENT OFFICE ELECTRIC LAMP STANDAugust Matthies, Elbingerode, Harz, Germany Application October 23,1937, SerialNo. 170,686

In Germany October 25, 1935 1 Claim. ('01. 248-160) u l mounted at itslower end in these brackets l5 Electric workshop lamp stands areknownbut are open to the objection that their range of use is veryrestricted. This objection is overcome by the lamp stand according tothe inven- 5 tion in that the lamp can be adjusted in height on thestand and brought into any desired position by inserting it in a socketeither at the head or at the foot end of the stand which is constructedto allow the light from the lamp to project in vertical, horizontal andinclined direction according to the distance from the lamp stand atwhich the work has to be carried out. The stand can be fixed in anyadjusted position and used for all working operations inside and outsidethe workshop. It can be used in combination with a table clip or withone or several sockets which are fitted in the wall, so that the lampcan also be employed in places which otherwise are not illuminated.

0 Several embodiments of the invention are illustrated by way of examplein the accompanying drawing, in which: i

Fig. 1 is a side elevation of the movable lamp. Fig. 2 shows in sideelevation a workshop lamp 5 stand suitable for the movable lamp.

Fig. 3 shows in side elevation a table clamp to be used in connectionwith the movable lamp.

Fig. 4 shows in perspective view an adjustable clamp for holding thelamp. i

0 Fig. 5 shows a wall arm in side elevation for holding the lampfthelatter being shown in dash lines in difierent positions.

Fig. 6 shows an extension-tube for table lamps equipped with a plug.

5 Fig. '7 shows in perspective view the foot of a table lamp adapted toreceive the lamp.

Fig. 8 is a longitudinal section through a plug, and i Fig. 9 a sideelevation of the same.

The lamp holder l is adjustably mounted on one end of a flexible metaltube 2 and directly connected to one end of a cable 3 the other end ofwhich has a wall plug for connection to the electricity supply mains. Aplug 5 is secured on the other end of the flexible tube 2 by means of asleeve 8.

Figs. 2 and 8 show a stand for adjustably carrying the lamp assemblyabove described. In each of these constructions the stand comprises abase H preferably mounted on casters and carrying a tool tray l2. Atransverse tube It extends across the tool tray l2 and is fixed onsupports I4. Two brackets l5 extend upwards from the tray 12 one on eachside of the trans- ;verse tube l3 and a vertical tube i6 is hingedly andcan be secured at any angle of inclination by means of a thumb screw ll.Several short pipe lengths i9, branch from the vertical tube It atdifierent points of its length and a second tool tray 2'! is fixed onthis tube near the upper end thereof. One or a pair of hooks iii arefixed on the vertical tube for carrying the cable 3 when the lamp is notin use.

An extenson tube 2| is slidably inserted into the upper end of thevertical tube it and held by friction at the adjusted height. Short pipelengths '22 also branch from this extension tube near the upper endthereof.

Both of the transverse tube I3, the upper end of the extension tube 2!and the free ends of the short pipe lengths I9, 20 and 22 form socketsfor the plug lot the lamp assembly. Thus the plug t can be insertedselectively in any one of these sockets and adjusted on the end of theflexible metal tube 2 and this flexible tube bent tical tube it whichcan also be swung about its lower end and fixed at any desired angle ofinclination by the thumb screw ll. 1

Fig. 4 shows a clamp for fixing on a table or the likeand provided witha socket 25 for re ceiving the plug A on the end of the flexible metaltube 2.

In the construction shown in Fig. 5 the base H,.transverse tube l3,supports it, tool trays l2 and 2'! and hooks iii are omitted and thestand, which is otherwise identical with that shown in Figs. 2 and 8, isthen fixed on a wall or the like by means of the supports Iii. In thisinstance the plug t of the lamp aggregate can be fitted in any of thesockets on the tubes l6 and El or in the end of the extension tube 2islidable in the tube It and whose angular position is fixed by the thumbscrew [1.

Figs. 6 and 'I show a form of construction comprising an extension tubelid on whose lower end i a plug t is secured by a sleeved Theplug and 4and means for connecting it to the end of the flexible tube 2 orextensiontube 3D. The plug has a screw threaded rear end 5, a hexagonalmiddle portion and a split front end forming two flexible fingers l, 4which constitute the plug proper. A bore extends from the rear endintothe split front end where it terminates in a tapered seat 6. Thesleeve 8 has a transverse wall 8 shutting off-a compartment 8"forreceiving the end of the flexible metal tube 2 which is secured in thiscompartment by a transverse pin, clamping screws or the like. The frontend of the sleeve 8 has an internal screw thread for receiving the screwthreaded rear end of the plug. A pin l is inserted in the bore in theplug and the pointed front end bears against the seat 6, whereas therear end of the pin projects from the rear end 5 of the plug so thatwhen the plug is screwed into the sleeve the rear end of the pin ispressed against the partition 9 causing the pointed end to force apartthe flexible pins t and press them against the inner wall of the socketinto which the plug is inserted.

I claim:

In an adjustable lamp stand with plurality of sockets, means forselectively fixing a lamp in any one of the sockets of the stand, saidmeans comprising in combination a flexible tube carrying at one end thelamp, a screw threaded sleeve fixed on the other end of said flexibletube, a transverse partition Wall in said sleeve, a plug having a screwthreaded rear portion adapted to be screwed into said sleeve, a splitfront portion forming flexible fingers, adapted to be inserted into asocket in the stand and having a central bore extending from the rearend into the split portion between said flexible fingers and terminatingin tapered portion forming a seat, and a pin inserted into said bore andhaving a pointed front end bearing against said seat and a flat rear endbearing against said portion wall, said pin adapted to spread saidfingers and press them against the inner side of the socket when thescrew threaded portion of the pin is screwedinto said sleeve.

AUGUST MATTHIES.

